Midshipmen selected for the the Program Executive Officer Land Systems 2019 Internship Program demonstrate work on developing a 3D-printed navigation board prototype for Marines. The program was established in 2013 as a way to introduce cadets and midshipmen from the U.S. Military Academy and USNA to the world of Marine Corps acquisition. (U.S. Marine Corps photo by Ashley Calingo) - Midshipmen selected for the Program Executive Officer Land Systems 2019 Internship Program demonstrate work on developing a 3D-printed navigation board prototype for Marines. The program was established in 2013 as a way to introduce cadets and midshipmen from the U.S. Military Academy and USNA to the world of Marine Corps acquisition. (U.S. Marine Corps photo by Ashley Calingo)